Peep sight for guns and the like



J. F.- DAHLBERG PEEP SIGHT FOR cuus AND THE LIKE July 6, 1954 2 Sheets-Sheet 1 Filed July 22, 1952 FIG. '4."

FIG. 2.

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J. F. DAHLBER G PEEP sxcm FOR Guns AND THE LIKE July 6, i954 2 Sheais-heet 2 Filed July 22, 1952 FIG. 5.

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mmvfozi Arrogwy Patented July 6, 1954 UNITED STATES PATENT OFFICE PEEP SIGHT FOR GUNS AND THE LIKE Jonas Folke Dahlberg, Seattle, Wash.

Application July 22, 1952, Serial No. 300,180

This invention relates to gun sights and particularly of the type adapted for use on rifles, shotguns and other similar small arms. It is an object of the invention to provide a sight of this kind having features of adjustability by means of which extremely accurate setting and shooting results will be obtained.

It is an object of the invention to provide a gun sight or the so-called peep-sight" type in which means is provided by which sighting under adverse light conditions will be aided; by means of which the rear sight and the co-operative front sight therefor shall be regulatable and adjustable to secure exceptional accuracy in shooting.

It is a further object of the invention to provide an adjustable gun sight of such nature and construction that adjustability can be readily had and setting of the sight at the required positions for accurate shooting assured.

With these and other objects in view, I have devised the particular arrangement of parts to be described and more particularly pointed out in the claims appended hereto.

In the accompanying drawings, wherein an illustrative embodiment of the invention is disclosed, Fig. 1 is an exploded view. with parts fragmentarily shown and other parts in section, of the improved rear sight;

Fig. 2 is a vertical sectional view of the sight;

Fig. 3 is a view looking at the under side of the housing of the sight;

Fig. 4 is a top plan view of the seat or saddle of the sight, with the cup-member or base attached thereto;

Fig. 5 is a side elevation of the sight;

Fig. 6 is a vertical sectional view of the sight with the housingor cup in a depressed position and the eye-piece partially unthreaded.

Fig. 7 is a side elevation of the front sight;

Fig. 8 is a side elevation, with a portion broken away, of the outer sleeve employed in a modified construction;

Fig. 9 is a sectional view through the front sight of Fig. 7, showing the manner in which the sleeve of Fig. 8 has been thread-ably attached to the said front sight;

Fig. 10 is a rear view of the rear sight to which a modified eye-piece, embodying the elements of Figs. 8 and 11, has been applied, and

Fig. 11 is one of the elements of a modified form of eye-piece.

Referring to the drawings, and particularly to Figs. 1 to 5 thereof, I indicates the saddle or seat of the improved rear sight. The under surface 12 Claims. (Cl. 3358) 2 of this saddle or seat is concaved or shaped as indicated at 2, to enable this curved surface of the saddle or seat to conform to the curvature of the gun or rifle barrel to which the sight is fitted. The saddle or seat I is apertured as indicated at 3, through which a screw 4 may be extended to secure the saddle or seat to the barrel.

The device includes a cup-shaped base member 5 which is adapted to be secured on the flat upper surface 5 of the saddle or seat I by means of the two screws indicated respectively at l and 8. For the selective reception of these screws 1 and 8 there are provided four internally threaded holes indicated respectively at 9, l0, II and I2. It will be noted that the two holes designated at 9 and ID are centered with respect to the longitudinal center line of the saddle or'seat l and hence centered with respect to the longitudinal axis of the barrel of the gun. When the cup member 5 is attached to the saddle or seat I by the entry of the screws 1 and 8 through the holes 9 and Hi, the sight will be accurately centered on the barrel of the gun. When it is desired to slightly oil-center the sight, this can be done by inserting the fastening screws I and 8 through the holes II and [2 which, it will be noted in the position of the cup in Fig. 4, are off-center with respect to the central transverse axis of the cup 5. Thus, by placement of the screws I and 8 through the required pair of holes in the cup 5, the cup can be positioned either centrally or off-center on the saddle l with respect to the longitudinal axis or the barrel.

The cup-shaped member 5 has its concave side disposed upwardly and it is provided with an annular side wall l3 formed at the top with four laterally projecting lugs l4. Located centrally within the cup and extending upwardly from the bottom thereof, is a boss i5 which is internally threaded as indicated at l6, said threads It being adapted to thread-ably receive the threaded stud [1 extending from an internally threaded sleeve l8 forming part of the eye-piece of the sight. Adapted to fit over the open top of the cupshaped member 5 is a housing or cup l9, which is externally threaded near its lower end, as indicated at 20, for the threadable reception of a knurled locking ring 2|. The inner wall surface within the housing I9 is divided into four segments indicated at 22, separated by the four vertical grooves 23 into which each or the four lugs Id at the top of the cup-shaped member 5 is adapted to fit in the normal position of the parts of the sight.

The housing or cup I! is provided with atop 3 wall 24 spaced from the upper ends of the segments 22 to provide a continuous annular channel 25 in which the lugs I4 will become positioned when the housing I9 is manually depressed in opposition to the upward pressure of a coil spring 26 seated in the cup 5 and surrounding the boss I5 and interposed between the cup 5 and the under side of the top wall 24 of the housing, as clearly seen in Fig. 2.

The eye-piece or peep-hole section of the sight includes the sleeve I8 provided with the threaded stud I I that is threadably and adjustably inserted within the boss I5 and reaches the boss I5 by passage through a central aperture 21 produced in the top wall 24 of the housing IS. The outer face of the top wall 24 is in the form of a channel 28, as clearly seen in Fig. 6, and said channel fits closely under and receives the sleeve I8. Threadably fitted within one end of the sleeve I6 is a plug member 29, provided with the peep-hole 30.

The assembled condition of the rear sight is that shown in Fig. 2, wherein it will be observed that the housing or cup I5 has been fitted over the cup 5 and is being thrust upwardly by the spring 26 to the extent permitted by the degree of insertion of the threaded stud II into the threaded portion I6 of the boss I5. The spring 26 thus holds the housing I9 tightly against the sleeve I8. When the locking ring 2I is threaded down tightly against the top of the seat or saddle .I, the parts will be securely held against inadvertent shifting or change of position, in the position shown in Fig. 2. While the parts are in the position shown in Fig. 2, the lugs I4 are located in the grooves 23 and hence the cup or housing I9 cannot at the time be rotatively moved with respect to the cup 5. When it is desired to adjust the eye-piece by raising or lowering it, and which eye-piece consists of the sleeve I8 and inserted peep-hole plug 29, thisis done by first loosening the locking ring 2I and unthreading it upwardly to an extent sufiicient to enable the cup or housing I9 to be manually pushed downwardly or depressed against the upward urge of the spring 26, until the four lugs I4 reach the top of the grooves 23 and enter the annular channel 25. When the lugs I4 are thus freed from the grooves 23 and enter the channel 25, the housing I9 can then be rotated and since the sleeve I8 is rotated in company with the housing or cup I9, the threaded stud I'I will be thus threadably moved upwardly or downwardly to accurately set or position the eye-piece, consisting of the sleeve I8 and plug 29, at the selected height. At each quarter turn of the housing I9 and the eye-piece carried thereby the housing I9 can be engaged with the cup 5 by simply releasing downward ,manual pressure on the housing to cause the housing I9 to rise slightly under the pressure of the spring 26 and permit the lugs I4 to enter into the grooves 23 of the housing. To facilitate depression of the housing I9 against the force of the spring 26 and to aid in rotating the housing and the eye-piece carried thereby. the top of the housing may be provided with the inclined fingerengaging surfaces indicated at 3| and 32. The manner in which the lugs I4 become positioned out of the grooves 23 in the housing I9 upon depression of the housing, to thereby permit rotative movement of the housing and the eyepiece carried thereby, is seen in Fig. 6, wherein it will be noted that the lugs I4 are therein located in the annular channel 25 permitting rotative movement of the housing I9 and thus causing the desired threading or unthreading movement of the stud n with respect it is received.

piece at the required elevation, the'parts are locked in such adjusted position by threading the locking ring 2I downwardly and into firm contact with the top I of the seat or saddle I. The adjusted position of the sight may be noted and repeatedly secured by means of the indicatin lines 23 engraved or otherwise produced on the sides of the housing, and which will indicate the extent to which the housing I! projects above the top of the tightened-down locking ring 2 I. These lines can be calibrated or otherwise marked to clearly designate the various adjustments of the device so that any setting, when once obtained,

can be repeated by reference to this indicating threaded portion 38 which threadably receives the threaded adjusting screws 46 and 4I operative against the shank portion 31 of the sight 28 in the manner clearly seen in Fig. 9. When it is desired to transversely adjust or position the sight 36, one of the screws 40, H is loosened, while the other is tightened, resulting in a transverse shifting of the sight 26 in the required direction to position it at the desired point, whereupon both screws are tightened and the setting is retained. calibrations 50 may be provided to indicate the settings of the adjusting screws.

In Figs. 8 to 11 inclusive, is shown a modified form of eye-piece. Therein is shown a sleeve I 8a provided with the threaded stud I'I similar to that shown on the sleeve i8, and receive in the boss I5 in the manner heretofore described. The plug 28 may be fitted in the sleeve "a in the manner already described. A transverse notch 42 is provided in the sleeve I8a. Adapted to be fitted on the outside of the sleeve Ila is a slotted tube 43, which is intemaliy threaded at one end. as indicated at 44. In fitting the tube 42 around the outside of the sleeve [8a, the tube is slipped over the sleeve in a manner to cause the slot 45 to fit around the stud II, which action locks the tube on the sleeve. When'the tube 42 is fitted on the outside of the sleeve Ila, the notch 42 is covered and concealed by the tube. with the parts so arranged, as shown in Fig. 10, the sight is used in the manner described in respect to the embodiment of Figs. 1 to 6. That is to say, the eye looks through the peep-hole 30 to line up with the front sight and the target.

When lighting conditions, such as at dusk, render the use of the conventional type of peep sight difficult to employ, the tube 43 may be removed from its position about the sleeve lie to thereby expose the notch 42, allowing the light to reach the interior of the sleeve I84; and thus increase visibility through the peep-hole 30. At the same time, the front sight 36 may be made clearer by the addition thereto of the tube 43. This tube is attached over the front sight 3! by threading it in position thereover, the threads 44 on the interior of the tube engaging with those indicated at 45a at the base of the sight 28. The front sight 36 with the tube 42 positioned upon to II which When the sight has hesitated tastes;

it is shown in Fig. 9. The interior of the tube 43 may be coated with light reflecting material, as indicated at 46 to enhance visibility when using the sight in the manner described.

Having described several embodiments of the invention, it is obvious that the same is not to be restricted thereto, but is broad enough to cover all structures coming within the scope of the annexed claims.

What I claim is:

1. A gun sight comprising, a cup fitted on top 01' a gun barrel, a housing movably fitted over the cup, a spring interposed between the cup and housing, interengaging means on the cup and housing for preventing rotative movement of the housing relatively to the cup, said means being normally held in interengagement by the spring, a sight adjustable vertically above the cup, said sight being exposed externally of the housing, and means by which the housing and sight can be manually rotated to secure vertical adjustment of the sight by manual depression of the housing against the urge of the spring.

2. A gun sight comprising, a pair of telescoping parts mounted on a gun barrel, a spring interposed between said parts for urging the same apart, a sight threadably mounted in one of the parts, interengaging means between the parts for preventing rotative movement of one of the parts relative to the other, locking means for preventing telescopic movement of one of the parts relatively to the other, said parts being telescopically adjustable upon freeing of said locking means and one of the parts being capable of rotative movement relatively to the other when the parts are telescoped to a predetermined extent.

3. A gun sight comprising a seat, a cup-shaped member mounted thereon, lugs extending from the cup-shaped member, a housing of cap-shaped formation movably fitted over the cup-shaped member, a spring interposed between the cupshaped member and the housing and tending to normally thrust the cup-shaped member and housing apart, a sight fitted on top of the housing, said housing having a central aperture, a stud on the sight extended through said aperture and in adjustable threadable engagement with the cup-shaped member, the housing having a plurality of grooves in its inner walls within which the lugs fit, the housing having an annular channel in its inner wall above the grooves and into which the lugs can be moved by depression of the housing against the pressure of the spring, and releasable means for holding the housing against depressing movement.

4. In a gun sight, an inner member constituting a spring seat, a spring'seated thereon, an outer member movably fitted over the inner member and in rotative relationship therewith and disposed on top of the spring, interengaging means on the inner and outer members held in interengaging relationship by the spring for normally preventing rotative movement of the outer member relatively to the inner member, and a sight located on the outside of the outer member, said sight having a threadable adjustable engagement with the inner member.

5. In a gun sight as provided for in claim 4, including means for permitting rotative movement of the outer member on the inner member when the outer member is depressed in opposition to the pressure of the spring, and a locking element adjustably fitted on the outer member for holding the outer member against depressing movement when said locking element is in its operative position.

6. In a gun sight, a seat fitted on a gun barrel, 9. cup secured on said seat and means by which said cup can be centered or off-centered in respect to the longitudinal axis of the barrel, radial lugs at the top of the cup, a cap-shaped housing fitted over the cup and provided with internal vertical grooves in which the lugs on the cup are located, the housing being provided with an annular channel in its inner face above the grooves and into which the lugs are caused to move upon depression of the housing relatively to the cup, the housing being rotative relatively to the cup when said lugs are positioned in the channel, a spring positioned in the cup and interposed between the same and the housing and tending to normally retain the housing in position to cause the lugs on the cup to lie in the grooves, a sight fitted on top of the housing, the housing having an aperture, the sight having a threaded stem projecting through said aperture, and the cup being provided with a central, internallythreaded boss in which said stem is threadably received.

'7. In a gun sight, a. seat fitted on a gun barrel, a cup secured on the seat, radial lugs on the cup, 2. housing fitted over the cup and provided with'internal grooves engaging the lugs and preventing rotative movement of the housing relatively to the cup, a channel in the housing into which the lugs are moved by manual pressure imposed on the housing, said channel permitting rotative movement of the housing with respect to the cup, a spring seated in the cup and interposed between the cup and housing, and a sight carried by the housing and in engagement with the cup and adjustable toward or away from the cup.

8. In a gun sight, a pair of telescopic parts. one of said parts being rotative with respect to the other part, one of the parts being attached to a gun barrel, a peep sight threadably engaged with said attached part, the second part being disposed between the peep sight and the attached part and being movable with respect to said attached part, a spring for urging the second part away from the attached part and against said peep sight, and means for preventing relative rotative movement of the two parts while said spring is urging the second part away from the attached part, said means permitting relative rotative movement of the two parts upon manual depression of the movable part and the spring interposed between it and the attached part.

9. In a gun sight as provided ior in claim 8. wherein the means which prevents relative rotative movement of the two parts consists of a lug-and-groove engagement between the two parts, and an annular channel provided in one of the parts into which the tongues on the other part can be moved by finger pressure to permit rotative movement of one part with respect to the other.

10. In a gun sight, a spring seat mounted on a gun barrel, a spring on said seat, a sight threadably received in the seat, a housing interposed between the seat and sight and urged upwardly against the sight by the spring, means for preventing rotative movement of the housing while it is upwardly urged by the spring. the sight consisting of a pair of sleeves concentrically arranged, with the inner sleeve provided with a peep hole extending through it and provided with a transverse notch extending across it.

11. In a gun sight as provided for in claim 10, wherein the outer sleeve is formed with a bayonet slot, the inner sleeve having a threaded stud threadably received in the seat, the bayonet slot engaging with said stud to hold the outer sleeve in place about the inner sleeve.

12. A gun sight comprising, a saddle fitted on a gun barrel, said saddle having a flat upper surface, a cup resting on said flat upper surface and attached to the saddle, said cup being capable of off-center attachment to the saddle, the cup being provided with an upstanding, centrallylocated, internally-threaded boss, a sight in the form of a sleeve provided with a threaded stud adjustably and threadably received in the boss, a housing fitted over the top of the cup and located between said cup and the sight. a spring in the cup exerting upward pressure against the housing to urge the same into contact with the sight, the housing having a curved upper surface to fit the curvature of the sight, interengaging means on the cup and on the housing to prevent rotative movement of the housing relatively to the cup while the housing is urged upwardly against the sight by the force of the spring, the housing having an internal annular channel into which interior parts or the cup are moved by manual depression imposed onthe housing to thereby permit rotative movement of the housing relatively to the cup and to permit rotative adjusting movement or the sight in company with the housing, and a locking element adjustably carried by the housing and operative against the saddle to prevent depressing movement of the housing.

References Cited in the file 01 this patent UNITED STATES PATENTS Number Name Date 42,091 Learock Mar. 29, 1864 800,195 Windridge Sept. 26, 1905 2,148,272 Kyle Feb. 21, 1939 2,444,844 Neal July 6, 1948 

